The Compatibility-mode technology is not exposed by default. To enable an interface so that you can use this technology for your programs after you apply SP2:
Log on as Administrator.
Click Start, and then click Run.
In the Open box, type the following command, and then click OK, where %SystemRoot% is the drive and folder in which Windows 2000 is installed:
regsvr32 %systemroot%\apppatch\slayerui.dll
Then the tab will be enabled on all shortcuts